Translate each statement into an equation with k as constant of variation. __________ 1. The area (A) of a parallelogram varies jointly as the length (l) and width (w).

__________ 2. The percentage of a number (P) varies jointly as Base (B) and rate (R).

__________ 3. The sale (S) varies directly to the expenses (E) and inversely as the square of commission (c).

__________ 4. The speed (s) varies directly to the distance (d) and inversely to the time (t).

__________ 5. The volume of a cylinder (C) varies jointly as its height (h) and radius (r)​